Polyimide network, semi-interpenetrating

PBI blends (with polyimides, polyarylates, poly (4-vinyl pyridine)) Semi-interpenetrating Polyimide Network ... 

Certain thermoplastic polyimides possess excellent resistances to high temperatures and chemicals, with Tgs ranging from 217 to 371 °C. Certain polyimides also exhibit excellent toughness and dielectric properties. The melt blending process of polyimides with other thermoplastic polymers is difficult due to polyimides high Tg, high melt viscosities, and incompatibility. A solution process is used, therefore, to achieve a semi-interpenetrating polyimide network... 

Jan Jang, B. Z., Pater, R. H., Soucek, M. D., Hinkley, J. A. Plastic deformation mechanisms in polyimide resins and their semi-interpenetrating networks. J. Polym. Sci. Part B Polym. Phys. 30 (1992) 643-654. 

Semi-interpenetrating polymer network membranes based on sulfonated polyimide-siloxane and epoxy polymers have been prepared [61]. The membranes show desirable mechanical properties and thermal stabilities, with proton conductivities superior to those of Nation 117 at 80 °C. 

J. Seo, W. Jang, S. Lee, H. Han, The stability of semi-interpenetrating polymer networks based on sulfonated polyimide and poly (ethylene glycol) diacrylate for fuel cell applications, Polym. Degrad. Stab. 93 (1) (2008) 298-304. 

C.H. Lee, Y.Z. Wang, Synthesis and characterization of epoxy-based semi-interpenetrating polymer networks sulfonated polyimides proton-exchange membranes for direct methanol fuel cell applications, J. Polym. Sci., Part A Polym. Chem. 46 (6) (2008) 2262-2276. 

Y.Z. Wang, K.S. Ho, S.D. Wu, K.H. Hsieh, C.H. Lee, Influence of sulfonationity of epoxy-based semi-interpenetrating polymer networks of sulfonated polyimides as proton exchange membranes on the performance of fuel cell application, J. Fuel Cell Sci. Technol. 7 (2) (2010) 021014(1-7). 

Chuah H H, Kyu T and Helminiak T E (1989) Scaling analysis in the phase separation of poly(j> phenylene benzobisthiazole)/Nylon-66 rigid-rod molecular composites, Polymer 30 1591-1595. Chang K Y, Chang H M and Lee Y D (1994) Molecular composites. 2. Novel block copolymer and semi-interpenetrating polymer network of rigid polyamide and flexible polyamide polyimide, J Polym Sci Part A Polym Chem 32 2629-2639. 

Another class of cross-linked networks incorporating NLO chromophores based on a semi-interpenetrating polymer network (semi-IPN) [105] and fully interpenetrating polymer networks (full-IPN) [106-108] has been investigated. These systems were developed to enhance temporal stability by realizing the ability of an IPN structure to improve the viscoelastic properties of polymers. The semi-IPN system was prepared by combining a high 7g polyimide and a sol gel network [105]. The poled semi-IPN sample has a of 28 pm/V at 1.064 /x,m. After over 168 h at 120°C, a retention of 13% of the d value was observed. 

Norbomene-terminated imide NR-150B type polyimide Acetylene-terminated phenylquinoxaline Polyphenylquinoxalines with pendent phenylethynyl groups Semi-interpenetrating polyimide networks... 

Pan, H.Y., Pu, H.T., Wan, D.C., Jin, M., Chang, Z.H. (2010) Proton exchange membranes based on semi-interpenetrating polymer networks of fluorine-containing polyimide and Nafion . Journal of Power Sources, 195, 3077—3083. 

Lee, S., Jang, W., Choi, S., Tharanikkarasu, K., Shul, Y., Han, H. (2007) Sulfonated polyimide and poly(ethylene glycol) diacrylate based semi-interpenetrating polymer network membranes for fuel cells. Journal of Applied Polymer Science, 104, 2965-2972. 

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